John s



v UNITED STATES V PATENT OFFICE,

JOHN s. SMITH, 0E JACKSON, MICHIGAN, Assrenon 0E ONE-HALF To THEADORE e.BENNETT, 0E SAME PLACE.

TIILE-MA-CHINEVI SPECIFICATION forming part of Letters Patent No.293,804, dated- February 19, 1884.

Application filed November 30, 1883. (No model.)

To all whom it may concern Be it known that I, JOHN S. SMITH, of Jackson, in the countyof Jackson and State of Michigan, have invented anew and useful Improvement in Tile-Machines, of which the following is aspecification.

My invention relates to that class of machines in which tubes of clayare formed by pressure, forcing the clay or other plastic ma-' terialfrom a chamber in a continuous stream through an annular die.

It consists in combining with a stationar core an adjustable tube andeccentrics, by which the tubular portion of the die may be adjustedconveniently, for the purpose of maintaining a uniform delivery of theplastic tube as it emerges through the annular die.

It 'is well known that whenever one part of the annulus is obstructed,as compared with another part, the plastic material will be retarded insuch obstructed portion, and consequently the emerging plastic tube willcurve toward that side, more material being delivered through the moreopen portion. This principle has been utilized to make curved pipe-suchas are employed for elbows or for trapsby affording to the operator themeans of controlling the efflux while the machine is in operation. Thesame means for making curves may be used for preventing the curvature ofthe emerging tube by counteracting irregularities; and I do nottherefore claim, broadly, all means by which this may be done, but seekin this specification to cover the special device which in practice Ihave found convenient for adjusting the shell to the core, and socausing the tube to be delivered'in proper shape.

In the annexed drawings, which make part of this specification, Figure 1is a perspective view of the die attached to a segment of the mill. Fig.2 is a section on the horizontal plane through the center of the core.Fig. 3 is an elevation, partly in section. a

The same letters are employed in all the figures in the indication ofidentical parts.

A is a plate attached to or forming part of the shell of the pug-mill;or it may be the end of a horizontal tile-machine. Through a round holein this plate the conical die B projects, being, as is common in suchmachines, supported on the end of the worm-shaft.

O is the external sleeve of the die, the clay being forced, in formingthe pipe, through the annular space between the core and the sleeve.

This sleeve is attached to or forms a part of theadjustable base-plateO, which has at one end a roundhole, O and at the other an ob- I longhole, 0 the longest diameter of which is on the line of the axis.passing through the centers of the die and the two holes. 'Stems D D,attached to the plate A, and atright' eccentrics may be turned.

F F are jam-nuts tapped onto threads cut on the outer ends of the stemsD, for the purpose of confining and holding in place the eccentrics. Thedie is adjusted by relieving the eccentrics by turning off the jam-nuts,and then, by means of wrenches placed on the heads of the eccentrics,they may be turned in the holes 0 0 carrying with them the sleeve untilit is brought into any desired relation to the core. Whatever may be theirregularity of form, whether on one side or the other, above or below,it may be corrected by the motion of the sleeve. allows the freetransverse play of the plate 0, the motion being controlled by that ofthe eccentric in the round hole.

When the sleeve is properly adjusted by means of the eccentrics, theymay be secured by turning on the jam-nuts.

What I claim as my invention, and desire to secure by Letters Patent, is

In combination with the core and adjustable sleeve of a-tile-machinedie, the eccentrics E E, acting in holes in the base-plate of the Theelongated hole 0 sleeve to adjust its position in relation to the core,substantially as set forth.

In witness whereof I have hereunto set my hand in the presence oftwoattestin g witnesses.

- JosEPH 11.00313,

J NO. G. MUNDY.

